.development-history-area {
  width: 100%;
  display: flex;
  justify-content: center;
}

.year-area {
  display: flex;
  width: 100%;
  justify-content: center;
  position: relative;
  .year-area-li {
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-right: 1vw;
    h4 {
      font-weight: 600;
    }
    .circle {
      width: 1vw;
      height: 1vw;
      border-radius: 50%;
      border: 1px solid #c1c1c1;
      margin: 1vw 0;
      background: #fff;
      z-index: 1;
      position: relative;
    }
  }
  .active {
    h4 {
      color: #e25656;
    }
    .circle::after {
      position: absolute;
      width: 0.5vw;
      height: 0.5vw;
      content: "";
      border-radius: 50%;
      background: #e25656;
      left: 24%;
      top: 18%;
    }
  }
}
.year-area::after {
  content: "";
  border: 1px solid red;
  position: absolute;
  width: 100%;
  top: 2.5vw;
}
.item-ul-detail {
  display: flex;
  justify-content: center;
  li {
    display: flex;
    img {
      width: 36vw;
      height: 26vw;
    }
  }
  .left_text {
    width: 30vw;
    background: #f1f9fe;
    height: 26vw;
    text-align: left;
    padding: 2.6vw;
    line-height: 2vw;
  }
}
